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Water Quality Data (WQX)

STORET Decommission

The STORET Warehouse was decommissioned on June 29, 2018.  WQX, the mechanism for publishing monitoring data, has remained unchanged and data will continue to be available through the Water Quality Portal. The STORET Dashboard will be temporarily unavailable, starting June 29th.  An alternative application with similar functionality will be deployed within a few months. Please email: if you have questions.

Water quality monitoring is a crucial aspect to protecting water resources. Under the Clean Water Act, state, tribal and federal agencies monitor lakes, streams, rivers and other types of water bodies to determine water quality condition. The data generated from these monitoring activities help water resource managers know where pollution problems exist, where to focus pollution control energies and where progress has been made.

  • The Water Quality Exchange (WQX) is the mechanism for data partners to submit water monitoring data to EPA.
  • The Water Quality Portal (WQP) is the mechanism for anyone, including the public, to retrieve water monitoring data from EPA.

The Water Quality Portal is the nation's largest source for water quality monitoring data. The Water Quality Portal (WQP) uses the  Water Quality Exchange (WQX) data format to share over 380 million water quality data records from 900 federal, state, tribal and other partners.


Water Quality Data Download

Water quality data submitted from over 900 federal, state and tribal agencies, watershed organizations and other groups are available to support your water quality analyses.

Water Quality Data Upload with WQX

There are two options for you to share your data using WQX. You can choose a standard web-based application (WQX Web) that uses Microsoft Excel spreadsheets or you can choose to create a custom submission application using WQX XML schema through Exchange Network Nodes or Node Clients.

Learn More about Water Quality Data

General Information, Data Assistance, Tools, Training Videos, User Community, and Funding.